Piston Ring Replacement - 4th Gen Honda Odyssey

Warranty Extension: MIL Comes On With DTCs P0301 thru P0304
Supersedes 13-081, dated January 23, 2018, to revise the information highlighted in yellow.
AFFECTED VEHICLES
Year               Model      Trim                   VIN Range
2011–13       Odyssey    ALL                Check the iN VIN Status for Eligibility

REVISON SUMMARY
• Under DIAGNOSIS, additional software information was added.
• Additional NOTES added under REPAIR PROCEDURE.
CORRECTIVE ACTION
2011 Models: Complete diagnosis procedure and if necessary, update PCM software (Procedure A), replace affected spark plugs then clean pistons and replace the piston rings (Procedure B).
2012–13 Models: Complete diagnosis procedure, replace affected spark plugs then clean the pistons and replace the pistons rings (Procedure B). No need for software update as 2012–13 model vehicles are equipped with updated software from factory.

BACKGROUND

American Honda is announcing a powertrain warranty extension as a result of a settlement of a class action captioned, Soto et al.v. American Honda Motor Co., Inc., Case No. 3:12-cv-1377-SI (N.D. Cal.).
The piston rings on certain cylinders may rotate and align, which can lead to spark plug fouling. This can set DTCs P0301 No. 1 cylinder misfire detected, P0302 No. 2 cylinder misfire detected, P0303 No. 3 cylinder misfire detected, P0304 No. 4 cylinder misfire detected, and cause the MIL to come on.
American Honda is extending the powertrain warranty to cover repairs related to engine misfire (that triggers DTCs P0301 through P0304) to 8 years with unlimited mileage from the original date of purchase and has settled a class action based on this remedial measure.
This warranty extension does not apply to any vehicle that has ever been declared a total loss or sold for salvage by a financial institution or insurer, or has a branded or similar title under any state’s law.
CUSTOMER NOTIFICATION
Owners of affected vehicles were sent a class action settlement notice regarding this warranty extension starting in October 2013.
Before doing work on a vehicle, verify its eligibility by doing an iN VIN status inquiry.
Refer customers seeking information about settlement benefits to www.enginemisfiresettlement.com, or instruct them to call 888-888-3082

DIAGNOSIS

1. Connect the HDS and check for the following DTCs: P0301 No. 1 Cylinder Misfire Detected, P0302 No. 2 Cylinder Misfire Detected, P0303 No. 3 Cylinder Misfire Detected, P0304 No. 4 Cylinder Misfire Detected.
Are any of these DTCs stored?
YES – Go to step 2.
NO – Stop. This bulletin does not apply. Continue with normal troubleshooting.
2. Remove and check the spark plug(s) on the affected cylinders (example: if P0301 is stored, check the spark plug on cylinder No. 1).
Are the spark plug(s) fouled?
YES – Proceed to Step 3.
NO – Stop. This bulletin does not apply. Continue with normal troubleshooting

3. For 2011 Odyssey only: Check the PCM software version P/N located above the PGM FI Data List.

Year/Model                                    Program ID (or later)                     Program P/N (or later)
2011 Odyssey (5-speed A/T)*             V0A560                                    37805-RV0-A56
2011 Odyssey (5-speed A/T)**           V0A240                                      37805-RV0-A24
2011 Odyssey (6-speed A/T)*             V0A760                              37805-RV0-A76
2011 Odyssey (6-speed A/T)**         (VIN before 5FNRL5…CB056992) V04250 37805-RV0-425
2011 Odyssey (6-speed A/T)**        (VIN including 5FNRL5…CB056992 and after)V0A360
37805-RV0-A36
2012–13 Odyssey (ALL)                    Software Updated from Factory
*With Keihin PCM
**With Continental PCM

Is the PCM Program ID and/or Program P/N the same or newer than what is listed above, 2011 model years only?
NO – The PCM software needs to be updated. Go to REPAIR PROCEDURE A to do the software update, then go to step 4.
YES – The correct software is installed. The piston rings on select cylinders need to be replaced. Go to step 4.
4. Note which DTCs are stored in the vehicle.
Does the vehicle have DTC P0304 stored? (Any combination of DTCs P0301, P0302, P0303, P0304 may also be stored.)
YES – Go to REPAIR PROCEDURE B for the cylinders listed, Cylinders 1–4: Clean the pistons, replace the piston rings, and replace the spark plugs.
NO – Go to REPAIR PROCEDURE B for the cylinders listed below:
• Cylinder 1–3: Clean the pistons and replace the pistons rings.
• Cylinder 1–4: Replace the spark plugs.